Joseph feebando



with my improved fireplace.

, ash-pits.

NITED STATES PATENT Eric,

JOSEPH EERRANDO, OE GENOA, ITALY.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 324,545, dated August 18, 1885.

Application filed May8,1885. (No model.) Patented in Italy April 2l, 1883, No. 15.355, July 5, 1883, No.15,617, February 7, 1884. No. 16.366, and December 22, 1884, No. 17,599; in England August 18, 1883, No. 4,013, and June 6, 1884, No. 8,681,- in France November 14, 1883, No. 156,877; in Belgium November 15, 1883, No. 63,079, and February 29, 1884, No. 64,184,- in Germany March 11, 1884, No. 26,259; in Austria-Hungary April 18, 1884, No. 46,698 and No. 16,472, and October 31, 1814, No. 21,621 and No'. 50,684,

and in Spain June 13, 1884, No. 3,929.

To all whom it may concern:

Be it known that I, JOSEPH FEERANDO, of Genoa, Italy, have invented certain new and useful Improvements in Steam Boilers, of which the following` is a full, clear, and exact description.

This invention relates to certain new and useful improvements in that class of tire-places burning pulverized or granulated fuel; and the object of my invention is to construct the tire-place in such a manner that the pulverized fuel is not drawn rapidly to the rear end of the fire-place before it is 'fully consumed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the ligures.

Figure l is a frontview of aboiler provided Fig. 2 is a longitudinal sectional elevation of the same on a smaller scale. Fig. 3 is an enlarged crosssectional view of a fireplace tube.

The ire-place is constructed with two or more half tubes or boxes, A, closed at the bottom and open at the top, and extending from the front plate, C, of the boiler D to the lire-wall E, and on the'top edges of the sides of the tubes A the gratebars F are placed transversely, the gratebars being placed very close, so that the pulverized or granulated fuel cannot fall down between them. The front ends of the half-tubes A are connected by a closed box, I, open at one end to admit the compressed air. The half-tubes A form the The air admitted to the rc can only pass through the Vbox l and the halftubes A. As the grate-tubes are placed very closely, they become hea-ted to avery high dcgree and must be cooled. This is accomplished by conducting steam from the dome into the tire-place half-tubes, through the pipe H and by conducting liquids or gases or gases and liquids into half-tubes through tubes K, which are perforated and located under the grate-bars.

M are the fireplace doors.

Having thus described my invention, what l claim as new, and desire to secure by Letters Patent, is-

l. The combination,\vith one or more boilerfurnaces, of the tire-boxes, upon which the grates are supported, and a fire-wall, the tireboxes extending from the front ofthe furnace to the said tire-wall, substantially as herein shown and described.

2. The combination, with a boilerfurnace, of the fire-boxes, upon which the grates are supported, a lire-Walhto which iirewall the tire-boxes extend, and of an air box connected with the front ends of the lire-boxes, which air-box is outside of thefront end ofthe boiler, substantially as herein shown and des r The foregoing specification Ot' my improvement in tire-grat-es burning tine and dusty fuels signed by me this seventh day of April, 1.885.

JOSEPH FERRANDO.

Witnesses:

ING LORENZO RAIMONDO. FELICE BOGETTA. 

